Tool sharpening and gaging machine.



E. R O RIVE. TOOL SHARPENING AND GAGING MACHINE.

APPLICATION FILED 001. 29, 1912.

Patented Dec. 30, 1913.

8 SHEETS-SHEET 1.

I/WENTOF ERNEST ROR/VE "WITNESSES."

BY HIS HTTORNEW/Q pf F W Z E. RORI VE T0 HAEPENING Y GAGING MACHINE.

PLIOATION PI 0053329, 1912.

3 SHEETS-SHEET 2.

1 0821823 Patented Dec. 30, 1913.

m III Il r WITNESSESr [NYE/W0)?- ERNEST RORIVE,

BYHISHTTORNW f MBIA PLANOORAPH E. RORIVE.

' TOOL SHARPENING AND GAGING MACHINE.

APPLICATION FILED OCT. 29, 1912.

Patented Dec. 30, 1913.

3 SHEETS-SHEET 8.

WITNESSES:

I N VEN T0)? ERNEST RoRwE COLUMBIA PLANOGRAPH co.,wAsmNu'rcN, 5.1:.

NITED STATES PA'rENr oicn.

ERNEST RORIVE, OF BRUSSELS,

BELGIUM.

TOOL SHARPENING AND GAGING- MACHINE.

To all whomit may concern Be it known that I, ERNEST RoRivn, a subjectof the King of Belgium, residing at Brussels, Belgium, have invented newand useful Improvements in Tool Sharpening and Gaging Machines; and I dohereby declare the following to be a full, clear, and exact descriptionof the same.

The present invention has for its object a tool sharpening and gagingmachine for rock drills, chisels and other tools for work ing iron orstone.

This machine is essentially characterized by the fact that the tool tobe sharpened,

rock drill, etc., while it is being knocked upon by a pneumatic hammerand pushed with its end to be sharpened, into a die or matrix having theprofile of the cutting edge to be given to said tool, the gaging of thehead of the tool is carried out by a vertical hammer, knocking at eachstroke on the periphery of the said head.

It is furthermore characterized by the fact that simultaneously with thetwo above processes the tool is rotated around its own axis by itshammer which is rotatable, this rotation of the tool to be sharpenedcarries around the matrix which can freely rotate in its bearing, insuch a way that very small part only of the cutting edge be sharpened ata time, as will be described farther on; this rotation furthermoreenables to gage the head of the rock-drill or other tool in anabsolutely perfect way by means of the ram of the vertical hammer; thesaid ram is provided at its bottom, with a recess engaging nearly halfof the head of the tool and being completed by a second recess providedin the stationary lower part or anvil of the above said hammer.

. The invention is furthermore characterized by the simultaneousness ofthe operationof the vertical and of the horizontal hammer, therapidstriking of the former favoring, in an important way, by the forg-Specification of Letters Patent.

Application filed October 29, 1912.

Patented Dec. 30, 1913.

Serial No. 728,475.

file of the matrix, owing to the fact that a part only of the cuttingedge of the tool is engaged, at a given moment in the matrix,

while the remainder can extend freely,

owing as well to the clenching by the matrix as to that produced by thestrokes of the vertical hammer.

The invention is furthermore characterized by the advancing device forthe horizontal hammer and the tool to be sharpened as will be describedfarther on.

It is also characterized by the rational irodification in the pneumatichammers.

It is also characterized by the application of an ejector wit-h a viewof very easily pushing the matrix out of its hearing when it is to bereplaced.

It is finally characterized by the fact that the cylinder of thevertical pneumatic hammer is connected to the bearing of the matrix andof the head of the tool to be sharp ened, by means of an auxiliary tube,by means of which at each stroke of the piston a jet of air is admittedinto the said bearing in order to expel the scales or battiture producedby the shock of the hammer on the tool and which would be noxious to theperfectness of the cutting edge.

A machine embodying the object of the present invention is representedby way of example, in the annexed drawing.

Figure 1 is a side view of the whole apparatus. Fig. 2 is a side view,partially in section, and on a larger scale, of the abutment with itsvertical pneumatic hammer and the bearing of the matrix and of the headof the rock drill or other tool. Fig. 3 is a corresponding front view.Fig. 4c is a view of detail showing the modification of the constructionof the pneumatic hammers. Fig. 5 is a side-view, partially in sectionshowing the arrangement of the horizontal hammer in its casing, beingalso its carriage and the way in which this carriage travels on thetoothed rack of the bed or frame. Fig. 6 is a corresponding end view,also partially in section. Fig. 7 is a diagrammatical view showing theangular arrangement of the axis of the matrix on the axis of the rockdrill or any tool in order to obtain straight cut-ting edges. Fig. 8 isa corresponding diagrammatical view showing the arrangement whichenables to obtain conical cutting edges. Fig. 9 is a fragmen tary sideView, partially in section, showing the inclination of the matrix andits bearing on the axis of the tool. Fig. is a cen tral longitudinalsection of the automatically rotating horizontal pneumatic hammeroperating the end of the tool to be sharpened; and Fig. 11 is across-section of the same on line AB in Fig. 10.

The sharpening machine which constitutes the object of the presentinvention comprises a long stretched frame having the form of a bed,provided on a part of its length with a toothed rack 1 on which thecarrier 2 can be moved by means of a hand wheel 3. The carrier 2contains a rotatable or automatically rotating pneumatic hammer at ofany known type. The tool to be sharpened is fixed by its rear end, forinstance of square section, into the said pneumatic hammer. Such apneumatic hammer is shown on a large scale in Figs. 10 and 11. Movablein the cylinder 19 of the said pneumatic hammer is a piston 20 having apart 21 extending to the end of the tool to be sharpened said end beinginserted in a square hole of a sleeve 22 having longitudinal grooves orribs engaging corresponding grooves 23 in the forward end of the piston.The distribution of the compressed air is controlled in the usual mannerby a valve 2-1 cooperating with the exhaust openings 25 in the cylinder19. The part 21 of the piston is provided behind the grooves 23, withwindings 26 of very large pitch engaging corresponding windings in aratchet sleeve 27 surrounding the said part of the piston. The sleeve 27is provided at its periphery with ratchet teeth engaged byspringactuated pawls 28 in such a manner that the said sleeve is free toturn when the piston moves forward (toward the tool), whereas it islocked in position when the piston moves backward so as to cause thepiston and thereby the sleeve 22 surrounding the fore part of thepiston, and the tool inserted in the said sleeve 22, to turn an anglecorresponding to the pitch of the windings 26. It will thus be seen thatthe tool is turned a certain angle each time the piston recedes from thesame. The pneumatic hammer such as above is generally known and is notclaimed as new by the inventor.

An abutment 5 is provided at the end of the bed. A stationary mass 6forms one piece with the abutment 5 or is fixed thereto in any suitableway; it may also be fixed directly to the bed itself. In the widest partof a recess 7 of the piece 6 the matrix 8 rests freely so as to be ableto rotate but not to move either longitudinally or laterally. The headof the tool to be sharpened will also rest in this recess 7 when it hasbeen pushed forward by means of the carrier 2 and the above-saidadvancing device. The recess 7 is completed by a corresponding recess 9of the ram 10 of a vertical pneumatic hammer 11, so as to form a cavityinclosing completely the matrix and the head of the tool. The pneumatichammer 11 moves upand down but does not rotate.

In order to sharpen and gage a tool, for instance a rock-drill 12, thehead is heated as is done for forging purposes and the square rear endis introduced into the hori- I zontal pneumatic hammer 4; then this hammer is advanced together with the rockdrill by means of the carriage 2which travels on the toothed rack 1 by means of its toothed wheel 13;for this purpose said carriage is provided witha hand wheel 3. At thismoment the pneumatic hammers are not operating and the ram 10 ismaintained in its highest position through a suitable retaining device,not represented. As soon as the head of the tool has been placed in thebearing 7 opposite the matrix 8 the ram 10- is allowed to drop and thecocks which admit the compressed air to the pistons of the hammers areopened. The automatically rotating horizontal hammer 4 strikes in theaxis of the tool and pushes it at each stroke farther into the matrix 8;at the same time the matrix 8, which turns freely in its support, iscarried around by the rotation of the tool; after a few seconds thecutting edge of the head of the tool is entirely sharpened. Betterresults are obtained more rapidly and with less expense of energy by theslight inclination of the matrix and its bearing on the axis of thetool, as is shown in Figs. 7, 8 and 9. In this way a part only of thecutting edge of the tool is sharpened at a time and the matrix iscarried around like a conical gearing by the rock drill or other tool,so that all the parts of the cutting edge are successively sharpened.The results obtained are superior in this way that no brutal stampingtakes place, as would be the case otherwise, but, on the contrary, acertain kneading of the cutting edge which can expand at certain placeswhere it is not in engagement with the matrix and it is thus forced tomore completely take the profile of this matrix. It is however wellunderstood that the inventor reserves for himself the right to arrangethese matrices'either in the axis of the rock drill or any other tool orobliquely to this axis. While the sharpening of the cutting edge takesplace by the. strokes of the horizontal hammer in the axis of the tool,the gaging of the head of the said tool is carried out by the strokes ofthe vertical hammer.

As has been said above, the ram 10 is provided at its face with a recess9 completing the recess 7 in the anvil so as to form a bearing .engagingthe sides of the head of the rock borer or other tool. The thus formedbearing or box is'somewhat wider than high; the head of the tool is thusconstantly forged and the forcing of the cutting edge into the matrix isnotably favorized; in fact, as soon as the vertical hammer strikes onthe head of the tool, this is slightly flattened transversely; but atthe following moment as the tool is rotating on its axis, its headpresents its largest diameter in the vertical direction in order to beagainclenched by the ram; this clenching thus takes place in anuninterrupted way and in all directions and while the gaging takes placethe sharpening is sensibly favorized. It is in fact easy to understandthat under the effect of the stroke of the vertical hammer the mass ofthe head is not only clenched transversely but also longitudinally andthis mass is thus forced into the profile of the matrix.

As has been stated above, the sharpening of a rock drill or other toolby means of the machine forming the object of the present invention iseffected, within a few seconds. If one takes into consideration, on

one hand that it is extremely often necessary to sharpen for instancerock drills, and on the other hand the relatively long time which isnecessary with the old machines, one will understand the importance andthe value of the device forming the object of the present invention.

When the matrix is to be replaced or simply to be extracted it willsuffice to lift the ram 10 and to retain it by its retaining device,then to knock on the button 15 of a rod 16 which crosses the abutment 5;the front end of the ejector 16 then pushes the matrix and makes ittravel up the incline of the recess 7 and thus pushes it out mosteasily.

To the cylinder of the vertical hammer 11 is connected a pipe 14 whichends at the bearing 7, 9 of the matrix and of the head to be sharpened,in such a way that, at each stroke of the piston air is blown into thesaid bearings, in order to expel the battiture produced by the stroke ofthe hammer on the tool and which would be noxious to the cleanness ofthe cutting edge.

VVha-t I claim is:

1. In a pneumatic tool sharpening machine, the combination with a matrixand a horizontal reciprocable hammer carrying the tool adapted to forcethe head of the tool into the matrix, of a vertically reciprocablehammer to gage the head of the tool.

2. In a pneumatic tool sharpening machine, the combination of ahorizontal reciprocable hammer having means to carry the tool; an anvil;a support for the head of the tool to be sharpened; a matrix alsocarried by said support and abutting against said anvil; and a verticalreciprocable hammer having a head conforming to the tool support, andsaid support and vertically reciprocable hammer adapted to gage the headof the tool.

3. In a pneumatic tool sharpening machine, the combination of ahorizontal reciprocable hammer, having means to carry the tool; ananvil; means to adjust said hammer means to rotate the hammer and toolas the hammer is reciprocated; a support for the head of the tool to besharpened; a matrix also carried by said support against axial andlateral movement but to have rotative movement; and a verticallyreciprocable hammer conforming to the tool head and support to gage thehead of the tool; said matrix adapted to rotate with the tool.

41. In a pneumatic tool sharpening machine, the combination of ahorizontal reciprocable hammer having means to carry the tool; an anvil.the face of which is arranged obliquely to the axis of the tool; meansto rotate the hammer and tool as the hammer is reciprocated; a supportfor the head of the tool to be sharpened; a matrix also carried by saidsupport against axial and lateral movement but to have rotativemovement, said matrix abutting against the oblique face of the anvil sothat its axis'of rotation will be at an inclination to the axis ofrotation of the tool; and a vertically reciprocable hammer conforming tothe tool head and support to gage the head of the tool, substantially asand for the purpose specified.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

ERNEST RORIVE.

Witnesses:

E. BORGHAUR VON MILUL, CHAS. ROY NASMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

